.float-wrap {
  overflow: hidden;

  .item {
    float: left;
  }
}

@mixin floatSpan($rowSpan, $colSpan) {
  .float-wrap {
    margin: $colSpan * -1px $rowSpan * -1px;

    .item {
      margin: $colSpan * 1px $rowSpan * 1px;
    }
  }
}

.hy5b {
  @include floatSpan(10, 10);
}